Features:
Aux.Supply:  24VDC.
The simatic S7-400 is designed for system solution in the manufacturing and process automation.
Rack system with various rack types.
Extremely high-speed processing and communication performance.
Changes to the configuration  during operation.
Isochronous mode on Profibus.
Fail –safe and Fault-tolerant versions.
User-friendly connections.
Operating Temp. 0-60°C
Up to 64 MB Memory.
Support Ladder,FBD,STL,SCL,CFC,S7-GRAPH and S7-HIGRAPH.
Real Time clock.
Communication Options RS485,RS232,Profibus,Ethernet,AS-Interface and EIB.
If a Particularly high level of availability is required,2 redundant power supplies are used.
Max. Distance between 2 CPUs -10KM.
System Redundancy & I/Os Redundancy also available.